CAP WITH VALVE

摘要

A cap with valve of the invention is provided with a negative pressure valve at a fluid entering flow path in a closure installed to an aperture of a container, so that fluid flows into the container from outside when pressure in the container is decreased, thereby decrease of the pressure in the container is prevented. A filter cloth is arragned to the fluid entering flow path at front side of the negative pressure valve and swells to the fluid entering side so as to cover the flow path.